<template>
  <div class="preview">
   
  </div>
</template>
<script>
export default {
  name: '',
  components: {},
  props: {},
  data () {
    return {
      // 显示隐藏
      dialogVisible: false
    }
  },
  activated () {},
  watch: {
    // 方法一 : name function () {}
    // 方法二 : name { 1. handler () {} 此方法可加 2. immediate = true 该回调开始立刻调用 方法一没有}
  },
  created () {},
  mounted () {},
  methods: {},
  // 计算属性
  computed: {}
}
</script>
<style scoped lang="less">
.preview {
  width: 100px;
  height: 100px;
  // background-color: red;
}
</style>
